The Bayonne woman charged with torching the six-family building on 19th Street where she lived has been sent to a state psychiatric hospital to be evaluated, officials said Tuesday.

Court officials said yesterday that Shahla Mirza, 21, has not made her first appearance on the charges of aggravated arson and three counts of aggravated assault related to Wednesday’s fire because she is now at the Ann Klein psychiatric hospital in Trenton.

Hudson County Prosecutor Edward DeFazio said the only reason Mirza would be at the hospital is to determine if she is competent to proceed in court on the charges related to the blaze that left three firefighters injured and 21 people homeless.

Bayonne Public Safety Director Jason O’Donnell and Bayonne police have so far provided no details on how the fire started or what the motive to set it may have been, although they apparently believe Mirza is to blame.

Tuesday, the damaged building was ringed with police tape and the front door and first-floor windows were boarded up. Windows on the upper floor were shattered, and the roof let in sunshine where the flames had consumed it.